feat(desktop): complete session websocket chat loop

packages/desktop/src/shared/desktopProtocol.ts

@@ -0,0 +1,72 @@
+/**
+ * @license
+ * Copyright 2026 Qwen Team
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+export type DesktopClientMessage =
+  | { type: 'ping' }
+  | { type: 'stop_generation' }
+  | { type: 'user_message'; content: string };
+
+export interface DesktopPlanEntry {
+  content: string;
+  priority?: 'high' | 'medium' | 'low';
+  status: 'pending' | 'in_progress' | 'completed';
+}
+
+export interface DesktopToolCallUpdate {
+  toolCallId: string;
+  kind?: string;
+  title?: string;
+  status?: string;
+  rawInput?: unknown;
+  rawOutput?: unknown;
+  content?: unknown[];
+  locations?: Array<{ path: string; line?: number | null }>;
+  timestamp?: number;
+}
+
+export interface DesktopUsageStats {
+  usage?: {
+    inputTokens?: number | null;
+    outputTokens?: number | null;
+    thoughtTokens?: number | null;
+    totalTokens?: number | null;
+    cachedReadTokens?: number | null;
+    cachedWriteTokens?: number | null;
+    promptTokens?: number | null;
+    completionTokens?: number | null;
+    thoughtsTokens?: number | null;
+    cachedTokens?: number | null;
+  } | null;
+  durationMs?: number | null;
+  tokenLimit?: number | null;
+  cost?: unknown;
+}
+
+export interface DesktopAvailableCommand {
+  name: string;
+  description: string;
+  input?: unknown;
+}
+
+export type DesktopServerMessage =
+  | { type: 'connected'; sessionId: string }
+  | { type: 'pong' }
+  | {
+      type: 'message_delta';
+      role: 'assistant' | 'thinking' | 'user';
+      text: string;
+    }
+  | { type: 'tool_call'; data: DesktopToolCallUpdate }
+  | { type: 'plan'; entries: DesktopPlanEntry[] }
+  | { type: 'usage'; data: DesktopUsageStats }
+  | { type: 'mode_changed'; mode: string }
+  | {
+      type: 'available_commands';
+      commands: DesktopAvailableCommand[];
+      skills: string[];
+    }
+  | { type: 'message_complete'; stopReason?: string }
+  | { type: 'error'; code: string; message: string; retryable?: boolean };